Refactor remaining 'var' to 'let/const' usages

lib/Webhooks.js

@@ -48,7 +48,7 @@ const Webhook = {
  opts.secret
  );
 
- var generatedHeader = [
+ const generatedHeader = [
  't=' + opts.timestamp,
  opts.scheme + '=' + opts.signature,
  ].join(',');

lib/makeRequest.js

@@ -64,8 +64,9 @@ function getRequestOpts(self, requestArgs, spec, overrideData) {
 
 function makeRequest(self, requestArgs, spec, overrideData) {
  return new Promise((resolve, reject) => {
+ let opts;
  try {
- var opts = getRequestOpts(self, requestArgs, spec, overrideData);
+ opts = getRequestOpts(self, requestArgs, spec, overrideData);
  } catch (err) {
  reject(err);
  return;

lib/utils.js

@@ -67,7 +67,7 @@ const utils = (module.exports = {
  /**
  * Outputs a new function with interpolated object property values.
  * Use like so:
- * var fn = makeURLInterpolator('some/url/{param1}/{param2}');
+ * const fn = makeURLInterpolator('some/url/{param1}/{param2}');
  * fn({ param1: 123, param2: 456 }); // => 'some/url/123/456'
  */
  makeURLInterpolator: (() => {

test/resources/BalanceTransactions.spec.js

@@ -1,7 +1,7 @@
 'use strict';
 
-var stripe = require('../../testUtils').getSpyableStripe();
-var expect = require('chai').expect;
+const stripe = require('../../testUtils').getSpyableStripe();
+const expect = require('chai').expect;
 
 describe('BalanceTransactions Resource', function() {
  describe('retrieve', function() {

test/utils.spec.js

@@ -510,8 +510,8 @@ describe('utils', () => {
  it('handles being unable to require `child_process`', () => {
  utils._exec = null;
 
- var actualErr = null;
- var actualRes = null;
+ let actualErr = null;
+ let actualRes = null;
  function myCb(err, res) {
  actualErr = err;
  actualRes = res;